Installation document for Show Discount Price
Change Status into Enable and edit another settings as image 4.
Go to Extensions ➔ Modules ➔ Click install Show Discount Price as image 3.
2. Add permission
Login to your Opencart admin and go to System ➔ Users ➔ User Group.
Click edit your user group name (Opencart default user group name is Administrator as Image 2.1).
Check both Access permission, Modify permission for Show Discount Price as image 2.2.
Unzip downloaded package and choose exact folder for your Opencart version.
Then you will see the file Show Discount Price OC v*.* - v*.*.ocmod.zip or only ***.ocmod.xml.
Go to your Opencart admin panel ➔ Extensions ➔ Extension installer.
Upload file ***.ocmod.zip or ***.ocmod.xml ➔ Continue as image 1.1.
Go to Modifications ➔ Click clear ➔ refresh buttons as image 1.2. This will remove and regenerate new cache for extension.